package com.example.cainiao.p3;
import java.util.*;public class RunoobTest {
    static void reverse(Integer a[])
{
    Collections.reverse(Arrays.asList(a));
    System.out.println(Arrays.asList(a));
}

    public static void main(String[] args)
    {
        Integer [] arr = {10, 20, 30, 40, 50};
        reverse(arr);
    }
}
